<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;

        }
        ul{
            height: 300px;
            overflow-y: auto;
        }
        li {
      width: 734px;
      height: 548px;
      background-color: rgba(0, 0, 0, .1);
      border: 1px solid #000;
    }
    </style>
</head>
<body>
    <ul>
        
    </ul>
    <script src="./index.js"></script>
    <script>

//     </script>
</body>
</html>